package com.hoten.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.hoten.common.constant.AuthServerConstant;
import com.hoten.common.exception.BizCodeEnume;
import com.hoten.common.utils.R;
import com.hoten.common.vo.MemberRespVo;
import com.hoten.gulimall.auth.feign.MemberFeignService;
import com.hoten.gulimall.auth.feign.ThirdPartFeignService;
import com.hoten.gulimall.auth.vo.UserLoginVo;
import com.hoten.gulimall.auth.vo.UserRegistVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.constraints.NotEmpty;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class LoginController {

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate stringRedisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone) {

        String redisCode = stringRedisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 600000) {
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(), BizCodeEnume.SMS_CODE_EXCEPTION.getMessage());
            }
        }
        String code = UUID.randomUUID().toString().substring(0, 5);
        String rCode = code + "_" + System.currentTimeMillis();
        thirdPartFeignService.sendCode(phone, code);

        stringRedisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone, rCode, 10, TimeUnit.MINUTES);

        return R.ok();
    }

    @PostMapping("/regist")
    public String regist(@Validated UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes) {
        if (result.hasErrors()) {
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
//            model.addAttribute("errors",errors);
            redirectAttributes.addFlashAttribute("errors", errors);

            //Request method 'POST' not supported
            //用户注册-->/regist[post]-->转发/reg.html(路径映射默认都是get方式访问的。) 什么叫转发？原请求原封不动转发给下一个请求。
            //return "forward:/reg.html";

            //防止表单重复提交，避免转发到页面，用重定向到页面
            //return "reg";

            //但是重定向Model获取不到，可以用RedirectAttributes重定向携带数据，利用session原理，将数据放在session中，只要跳到下一个页面取出数据以后，session里面的数据就会删除，
            //TODO 分布式下的session问题
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        String code = vo.getCode();
        String s = stringRedisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)) {
            if (code.equals(s.split("_")[0])) {
                stringRedisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());

                R r = memberFeignService.regist(vo);

                if (r.getCode() == 0) {
                    return "redirect:http://auth.gulimall.com/login.html";
                } else {
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg", r.getData("msg", new TypeReference<String>() {
                    }));
                    redirectAttributes.addFlashAttribute("errors", errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }

            } else {
                Map<String, String> errors = new HashMap<>();
                errors.put("code", "验证码错误");
                redirectAttributes.addFlashAttribute("errors", errors);
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        } else {
            Map<String, String> errors = new HashMap<>();
            errors.put("code", "验证码错误");
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimall.com/reg.html";
        }
    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session) {

        R login = memberFeignService.login(vo);

        if (login.getCode() == 0) {
            MemberRespVo data = login.getData(new TypeReference<MemberRespVo>() {
            });
            session.setAttribute(AuthServerConstant.LOGIN_USER, data);
            return "redirect:http://gulimall.com";
        } else {
            Map<String, String> errors = new HashMap<>();
            errors.put("msg", login.getData("msg", new TypeReference<String>() {
            }));
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }

    }


    @GetMapping("login.html")
    public String LoginPage(HttpSession session) {
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute == null) {
            return "login";
        } else {
            return "redirect:http://gulimall.com";
        }

    }

//    @GetMapping("reg.html")
//    public String regPage(){
//        return "reg";
//    }

}
